[填空题]
A cyclist accelerates from rest+2 9s 8w; 7uu ;tucmedf mjo;rdi-*oxa aqnbsv 71+xoh-j,ofe 3tknu7+t a rate of 1 m/$s^2$ How fast will a point on the rim of the tire at the top be moving after 3.0 s? [Hint: At any moment, the lowest point on the tire is in contact with the ground and is at rest — see Fig. 8–51.] $m/s$